The battery set goes inside the housing assembly. It is available as an individual replacement part that contains two batteries. This genuine item is supplied by the original equipment manufacturer for use with Dremel cordless rotary tools. A screwdriver may be necessary during the installation of this part. It will need to be replaced when the batteries die.
This metal screw is a genuine Dremel replacement part. It was designed for use with the 1100 (F013110047) Cordless Rotary tool and is used to secure the housing assembly. It is an identical replacement for a missing or damaged screw that originally came with a new unit. This item is sold individually.